An IMS Restoration System with Selective Storing of Session States

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概要

• 論文の詳細を見る

• It is known that the IP Multimedia Subsystem (IMS) provides various telecom services e.g., VoIP, instant messaging, and video conferencing. In the IMS, these services are provided with session initiation protocol (SIP) handled by call/session control function servers (CSCFs). Completing the SIP signaling call flow without delay is vital to provide satisfactory services to the users. For service continuity, previous studies redundantly synchronized session states of CSCFs with backup servers. This paper proposes an IMS restoration system that selectively stores the session states. This is achieved by utilizing the retransmission mechanism of SIP. Time-based simulation emulating the process of backup servers shows that the proposed system reduces the number of backup servers to less than 38% compared to the previous studies, without degrading the service quality.

• The Institute of Electronics, Information and Communication Engineersの論文

著者

• Yokota Hidetoshi

  Kddi R & D Labs Inc.

• Kitatsuji Yoshinori

  Kddi R & D Laboratories Inc.:kyushu Research Center Nict

• SHOJI Yozo

  NICT

• Nishinaga Nozomu

  Nict

• USUI Takeshi

  KDDI R&D Laboratories

• NAKAUCHI Kiyohide

  NICT

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